Off-topic, but just out of curiosity, why would people insist on top-posting like e.g. rfa in post #8 above?

It's annoying enough in emails I have to deal with every day at work but there I can at least accept people being clueless/careless/lazy (delete as appropriate) and just typing wherever Holy Microsoft has put the cursor. But to reply to a TMO post and still top post means going out of one's way to do it on purpose, since TMO is civil enough to place your cursor below the quoted text where it belongs.

I am not asking people to change their ways, that would be too much to ask. Just a simple rationale would do. As I say, out of curiosity.

@pichlo, you just outed yourself as a structure-nazi.
And I am absolutely with you.

But I already guessed that the answer is the obvious one: This is what many are accustomed to, i.e. what they perceive as usual (/ "normal") style.
But @rfa also provided a rationale, which I heard a couple of times from regular OL users reasoning for their email reply style, when using different clients than Outlook.

Originally Posted by rfa

[...]I'm sorry if I've broken any rules

Don't worry, you did not "break any rules".
It is just an etiquette. Plus for "defenders of the right style", a convention.

I think a proper take away from @pichlo's injunction may be:
Do not top-post in Unix-centric environments.